Issue #3233587: Create a build test that tests calling API as cleanly as possible

src/ComposerStager/Committer.php

+<?php
+
+namespace Drupal\automatic_updates\ComposerStager;
+
+use Drupal\update\UpdateManagerInterface;
+use PhpTuf\ComposerStager\Domain\CommitterInterface;
+use PhpTuf\ComposerStager\Domain\Output\ProcessOutputCallbackInterface;
+
+/**
+ * Defines a committer service that clears stored update data.
+ */
+class Committer implements CommitterInterface {
+
+  /**
+   * The decorated committer service.
+   *
+   * @var \PhpTuf\ComposerStager\Domain\CommitterInterface
+   */
+  protected $decorated;
+
+  /**
+   * The update manager service.
+   *
+   * @var \Drupal\update\UpdateManagerInterface
+   */
+  protected $updateManager;
+
+  /**
+   * Constructs a Committer object.
+   *
+   * @param \PhpTuf\ComposerStager\Domain\CommitterInterface $decorated
+   *   The decorated committer service.
+   * @param \Drupal\update\UpdateManagerInterface $update_manager
+   *   The update manager service.
+   */
+  public function __construct(CommitterInterface $decorated, UpdateManagerInterface $update_manager) {
+    $this->decorated = $decorated;
+    $this->updateManager = $update_manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function commit(string $stagingDir, string $activeDir, ?array $exclusions = [], ?ProcessOutputCallbackInterface $callback = NULL, ?int $timeout = 120): void {
+    $this->decorated->commit($stagingDir, $activeDir, $exclusions, $callback, $timeout);
+    $this->updateManager->refreshUpdateData();
+    update_storage_clear();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function directoryExists(string $stagingDir): bool {
+    return $this->decorated->directoryExists($stagingDir);
+  }
+
+}